True
x + y + z = x + z + y is the commutative property of addition.
Without an equality sign and not knowing the plus or minus value of 81 it can't be solved. If you mean: z+81 = 9z-7 Then: z-9z = -7-81 => -8z = -88 By dividing both sides by -8: z = 11
z = -4 x-5 y+2
3x + 2 = 82
Z + or - i and z-1
1
Ten z plus one, or ten z plus ten. That depends on where you had parentheses in the original expression: (10 * z) +1 = 10z + 110 * (z + 1) = 10z + 10
11z
Z= -1
-3z+17+12z = 11 9z = -6 z = -2/3
It's 9z-7. because: you do the 8 times z first (8z) then add the z, (9z), then minus 7. 9z-7
(11, 1, 0) and (0, 1, 11) are the two possible solutions.
678 + xyz + 360 = xyz + 1038
True
24x2y2z5
Z + 11 = 35 > Z = 24 Z - 11 = 35 > Z = 46